i got this error msage
Site error: the file /usr/local/cpanel/whostmgr/docroot/cgi/install_softaculous.php requires the ionCube PHP Loader ioncube_loader_lin_5.2.so to be
installed by the site administrator.

In order to install Softaculous ensure ionCube Loaders are enabled.
If it is not enabled you can go to WHM >> Tweak Settings >>PHP >> Select ioncube from Loader to use for internal cPanel PHP
2) Now Login to the server as root.
3)Go to the directory /usr/local/cpanel/whostmgr/docroot/cgi
[root@server~]# cd /usr/local/cpanel/whostmgr/docroot/cgi
4) Download Softaculous
[root@server cgi]# wget -N http://www.softaculous.com/ins/addon_softaculous.php5) Change the permissions to 755
[root@server cgi]# chmod 755 addon_softaculous.php
That’s for the command line.
Now login to WHM
6) Go to WHM > Plugins> Softaculous – Instant Installs
If the installation was successful it show you the following page: